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Question 260231: I am an old lady who has returned to school after a 30 year absence. I skipped ALL math related classes in high school as I think my left-brain never developed as a child, LOL. Anything involving numbers paralyzes me with fear.
And here I find myself trying to learn what most kids now learn in 3rd grade....and struggling mightily with it. The only way I can make it sink in is to tear the textbook apart word for word, and makes notes and draw diagrams in the most basic way possible. I now find myself at the very beginning of the geometry book and I'm attempting to join two rays to make an angle. The book tells me that one of these rays is called the initial side, and one is the terminal side. I need to make my diagram showing this, but I don't know which ray to label terminal and which ray to make initial. I've googled, and googled, and can't find the answer. Maybe it doesn't matter? Maybe either ray can be the initial ray?
If you can explain this I would be ever-so grateful. I'll go pop another nerve pill while I wait. LOL.
Found 2 solutions by richwmiller, ankor@dixie-net.com:
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website! The standard convention says it does matter.
Look at this web page and notice where all initial rays are always.
http://www.homeschoolmath.net/teaching/g/measure_angles.php
The initial ray is on the horizontal axis. Then it is measured going counter clockwise.
Answer by ankor@dixie-net.com(22740)  (Show Source):
You can put this solution on YOUR website! Just a way to make a simple thing complicated.
:
Two rays are joined by their endpoints to form an angle,
:
Think of the initial ray as 0 degrees, and the terminal ray as the measure of the angle. Many cases, it does not matter which ray you measure the angle from. Just be consistant
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